JPH02112298A - Printed board and its manufacture and connection thereof - Google Patents

Abstract

PURPOSE:To improve connection strength by making one end side of a connector support a surface of a main substrate through a close surface-contact, by supporting a sub-substrate thereon through a close surface contact and adhesion, and by bonding an L-shaped connection terminal on a surface of the sub-substrate. CONSTITUTION:When a connection terminal 20B is inserted into an insertion hole 114, a side line of the main body section 20A is brought into close contact with a substrate surface and an end side 200A is bonded to an end side of one side periphery section of a substrate 11 at a surface contact. Then, a projection section to a substrate surface of the connection terminal 20B is clinched to an end section conductor 113 of a circuit pattern 112 and connected by soldering. When extra substrates 10A..., 10B are cut at V-shaped cut grooves 111A, 111B and 121A, 121B, a sub-substrate 11 is manufactured. If connecting terminals 20C... of a connector 20 are inserted to terminal holes 31... until an end side 200B comes into close contact with a substrate surface, the sub-substrate 11 is temporarily fixed on a packaging surface of a main substrate 30. Then, a rear of the main substrate 30 is immersed in a solder tank to solder and fix the connecting terminals 20C... to a land 33 of a pattern 32. A substrate space can be used effectively in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure and manufacturing method of a printed circuit board, so-called sub-board, which is connected to a main board in a daughter-mother manner, and a method of connecting it to the main board.

BACKGROUND OF THE INVENTION In recent years, standardization has progressed significantly in the fields of audio equipment, video equipment, and the like. As one of the elements,
For example, a method has been adopted in which the entire circuit is divided into multiple blocks according to function, the printed circuit boards formed for each block are standardized, and the printed circuit boards of the same block are used in common for products of different models. It is well known that such a standardized small printed circuit board is called a daughter board, and the main board to which it is bonded is called a mother board, and the method of bonding such printed circuit boards is called the daughter-mother method. be. According to this daughter-mother method, higher density and higher integration of the circuit board can be achieved.

Conventionally, a method using a connector has been used to connect a daughter board, a so-called sub-board, to a mother board in this daughter-mother system.

FIGS. 5 and 6 show a coupling structure using the connector. Figure 5 shows the sub-board viewed from the side.
FIG. 6 shows how it is coupled to the main substrate.

It should be noted that various parts have been mounted on both boards in advance for connection, but illustrations are omitted because both boards are integrated into one board.

In FIG. 5, a connector 2 is attached to one side of the sub-board 1 along one side. The connector 2 has connection terminals 2 on opposite sides of the resin-molded main body 2A.
B, 2C are protruded, one connecting terminal 2B is bent into an L shape, and the other connecting terminal 2C is bent into an L shape, and the main body part 2A
The terminal protrudes substantially perpendicularly to the side of the terminal to form an L-shaped terminal.

One of the connection terminals 2B is inserted into the insertion hole IA formed on one side of the sub-board 1, and then fixed by soldering to the land 3A of the pattern 3 on the back side. Now, the connector 2 is attached to one side of the sub-board 1, and the mustard-shaped terminal 2 is attached to the edge.
A connector connection portion is formed in which C protrudes parallel to the board surface. In this case, the L chamber terminal 2C extends laterally from the edge of the board at a position protruding from the board surface by a height d. When connecting to the main board 4, the L-shaped connecting terminal 2C of the connector 2 is inserted into the insertion hole 4A, and is fixed by soldering to the land 5A of the pattern 5 on the back side. As a result, sub board 1
are supported on the main board 4 in a perpendicular state as shown in FIG. 6, and the two boards 1.4 are mechanically and electrically connected via the connector 2.

Problems to be Solved by the Invention According to the conventional printed circuit board connection structure described above, the sub-board 1 is supported on the main board 4 only by one edge, and moreover, is merely in contact with the board surface in a floating state. That-
G, since it is separated from the L chamber terminal 2C of the connector 2 that holds the board by a distance d commensurate with its protrusion height d, the mounting posture is unstable, the support strength is weak, and the connection strength is poor. There's a problem.

In addition, since a dead space including the interval d always occurs around the connector connection part, a large occupied space is required.
Another drawback is that space cannot be used effectively.

This invention was proposed in view of the above points, and it increases the bonding strength of printed circuit board connectors connected by the daughter-mother method, and also reduces the dead space around the connector connection part to make effective use of space. The purpose is to make it possible.

Means for Solving the Problems In order to achieve the L-shape, the present invention bends one of the connecting terminals protruding from both sides of the connector body into an L shape, and
Insert the shaped connection terminal into the insertion hole formed in the direction of one side of the board, connect it by soldering on the back side, and also extend it towards the edge of the board with the base side closely parallel to the board surface, and connect the connector at the extended end. A board configuration is adopted in which one end surface of the main body is brought into close surface contact with the end surface of the board, and the other end surface protrudes in the connection direction to the main board to form a connector connection part.

In addition, the present invention forms the sub-board in a cuttable manner on the board base material, and punches out an opening between one side of the sub-board and the disposable board, so that one side of the connection terminals protruding from both sides of the connector main body can be cut out. Bend it in an L shape, insert this L-shaped bent part into an insertion hole formed in one side direction of the sub-board, connect it by soldering on the back side, and bring the front side of the board in close contact parallel to the board surface, In addition, the method for manufacturing a printed circuit board involves inserting the connector main body into the above-mentioned space [''] and bringing one end surface of the connector body into close contact with the end surface of one side of the sub-board to form a connector connection part, and then cutting the sub-board from the base material of the board. Has characteristics.

Further, the present invention provides a connector having an L-shaped connection terminal on one side of the connection side with the main board, in which the end face of the connector is brought into close surface contact with the end face of one side of the board, and the tip side of the L-shaped connection terminal is Insert into the insertion hole formed along one side and connect with solder on the back side, bring the front side of the board into close contact with the board surface, and protrude the other end side of the connector body in the connection direction with the main board. At the same time, form an insertion hole on the front and back sides at the connection position of the main board, insert the other side connection terminal of the connector into the insertion hole of the main board until the other end of the connector body comes into close contact with the board surface, and then On the other hand, soldering is the gist of the connection method.

After inserting the connection terminal of the connector connection portion formed on one side of the working sub-board into the insertion hole of the main board and fixing it by soldering on the back surface, the sub-board is connected to the main board -E at an intersecting angle.

The connector is mounted with its main body in close contact with the main board. In this connector, the sub-board is supported with the end face of one side and the end face of the main body in close contact with each other. Furthermore, the L-shaped connection terminal is inserted and connected in close contact with the surface of the sub-board. Therefore, the sub-board is
It is in close contact with the main body of the connector, is closely connected to the L-shaped connecting terminal, and is held on the main body of the connector mounted on the main board. There are no gaps in the connection part of the sub-board due to tight bonding, and the support t4 strength of the connection,
Bond strength increases.

Furthermore, there are no terminal protruding parts around the connector body, and the sub-board is only closely supported, so the space occupied by the connector at the board connection area can be minimized. , the dead space around it can be eliminated.

Example Embodiments of the present invention will be described below based on the drawings.

Figures 1, 2, and 3 show the manufacturing process and procedure of a printed circuit board, a so-called sub-board, according to the present invention.
In the longitudinal direction of the large substrate base material 10, the sub-substrates 11, 12 are formed in two rows, for example, eight locations. In addition, in the figure, a pair of opposing left and right sub-boards LL1
Only 2 is shown. V-cut grooves 111A, 1111B, 121A, 121 are provided at the periphery of each sub-board LL12.
B is formed, and each of the sub-boards 11 and 12 can be cut out at this V-cut groove. Around the sub-boards 11 and 12 of the people, there are V-cut grooves 111A1111B and 1
It is formed so that it can be cut and removed with 21A and 121B as boundaries. Openings 101 and 102 are punched out by press working between the sub-board 11 and the sacrificial substrate 10B on the center side, and between the sub-substrate 11 and the sacrificial substrate 10B on the right side.

Circuit patterns 112...-1122-... on the back side are formed on the edges of the openings 101 and 102 of each sub-board LL12.
are extended adjacent to each other, and the end conductors 113 and 123 of the resist film are exposed by removing the resist film. An insertion hole 114.124 is formed through the center of each end conductor 113.123. Insertion holes t14-..., 124... are sub-board 11.1
The openings of 2 are formed at predetermined intervals in the direction of one side in contact with the 21 parts 101 and 102.

Connectors 20 are respectively attached to one side of the sub-board LL12 on the opening side. The connector 20 includes a main body 2OA made of an insulating base material molded with a resin, and a main body 2OA made of an insulating base material molded with a resin.
A plurality of (8 pins in the illustrated case) connection terminals 20B protrude from one end surface 200A and the other end surface 200B of the OA, respectively.
, 20C... One connection terminal 20B extends perpendicularly from one end surface 20OA so as to be parallel to the substrate surface, and its tip is bent in an L shape toward one side of the main body 20A, and is an L-shaped terminal. is formed. The other connection terminal 20C... is the other end dii20OB
It protrudes perpendicularly to the connection direction with the main board.

When the connector 20 is attached to the sub-board 11 (12), when one connecting terminal 20B is inserted into the insertion hole 114 (124), the side wire of the main body 2OA is brought into close contact with the surface of the board. At the same time, one end surface 20 of the main body 2OA of the connector 20
0A is brought into close contact with the end face of one edge of the substrate 11 (12) in surface contact. Next, the protruding portion of the connection end 7-20B to the back surface of the board or the end conductor 113 of the circuit pattern 112 (122)
(123), the caulking is clinched, and then f1
11 is connected. The connector main body 2OA has an end face 2
The opening [21 part 1
01 (102).

In this way, the connector connecting portion 200 is formed to protrude from one end surface of the board in the direction of connection to the main board.

Next, the surrounding disposable boards 10A6..., 10B number...
When the cut grooves 111A, IIIB, 121A, and 121B are cut and removed, the sub-board 11 (12) with the connector connecting portion 200 protruding from one edge is produced as shown in FIG.

On the other hand, terminal holes 31 corresponding to the connection terminals 20C of the connector 20 are formed at the connection positions of the sub-boards 11 (12) of the main board 30 so as to penetrate from the front and back sides. This terminal hole 31 penetrates through the center of a land 33 of a circuit pattern 32 formed on the back surface of the substrate.

To connect the sub board 11 (12) to the main board 30, insert the other side connection terminal 20C of the connector 20 into the corresponding terminal hole 31 until the other end surface 200B of the main body comes into close contact with the board surface. Then, the sub board 11 (
12) is temporarily fixed on the mounting surface of the 7472 person board 30 at an angle perpendicular to the mounting surface. Next, when the back side of the main board 30 is immersed in a bath for half a day, the connection terminals 2 of the sub board 11 (12)
0C... is fixed to the land 33 of the pattern 32 with the half day mark. Thereby, the sub-board 11 (12) is electrically and mechanically connected to the main board 30 via the connector connecting portion 200, as shown in FIG.

According to the present invention, the end face of the connector is closely supported in surface contact with the surface of the main board, and the sub-board is closely supported on top of it in surface contact. Since the L-shaped connection terminals are in close contact with the surface of the sub-board, the sub-board is supported in a stable mounting posture via the connector main body. Therefore, the bonding strength and support strength of the printed circuit board by the daughter-mother method are increased. Further, the space occupied by the connector connection section is only the installation space of the main body, and the space occupied can be reduced to a minimum. This makes it possible to reduce the dead space around the board connection portion and make effective use of the space.

[Brief explanation of the drawing]

Fig. 1 is a plan view illustrating the manufacturing process and f order of the printed circuit board according to the present invention, Fig. 2 is a side cross-sectional view illustrating the same process and procedure, and Fig. 3 is a side view of the printed circuit board according to the present invention. , FIG. 4 is a side view showing how the printed circuit board of the present invention is connected using the daughter-mother method, FIG. 5 is a side view showing a conventional printed circuit board, and FIG. 6 is a side view showing how it is connected to the main board. It is a diagram. DESCRIPTION OF SYMBOLS 10... Board base material, 11.12... Sub board, 200... Connector connection part, 20... Connector, 20A... Main body part, 20B... L-shaped connection terminal, 20C... φThe other connection terminal, 200A...One end surface, 101.102...Opening, 30...Main board, 31...Terminal hole. Figure 3 Figure 00A Figure 5

Claims (5)

[Claims] (1) In a printed circuit board that is connected to the main board via a connector using the daughter-mother method, one of the connecting terminals protruding from both sides of the connector body is bent into an L shape, and the L-shaped connecting terminal is connected to the board. It is inserted into an insertion hole formed in one side direction and connected by soldering on the back side, and the base side is brought into close contact with the board surface and extended toward the edge of the board, and the extended end connects one end surface of the connector body to the end surface of the board. Bring it into close contact with each other,
A printed circuit board, characterized in that the other end surface side protrudes in a connection direction to the main board to form a connector connection part. (2) A sub-board to be connected to the main board is formed on the board base material so that it can be cut out, and an opening is punched out between one side of the sub-board and the waste board, so that connecting terminals protrude from both sides of the connector body. One side is bent into an L shape, this bent part is inserted into an insertion hole formed in one side direction of the sub-board, and the back side is soldered and connected, and the front side of the board is brought into close contact with the board surface, and , the connector body is fitted into the opening, one end surface thereof is brought into close contact with one side end surface of the sub-board to form a connector connection portion, and then the sub-board is cut from the substrate base material. A manufacturing method for printed circuit boards. (3) In a printed circuit board that is connected to the main board via a connector in the daughter-mother method, one end surface of the main body of the connector that has an L-shaped connection terminal on one side of the connection side with the main board is connected to the one side of the connector. The end surface of the L-shaped terminal is brought into close contact with the surface of the board, and the tip end of the L-shaped terminal is inserted into the insertion hole formed in the direction of one side, and connected by soldering on the back side, and the front side of the board is brought into close contact with the board surface, and the main body part While the other end side protrudes in the connection direction with the main board, an insertion hole is formed through the front and back at the connection position of the main board, and the other side connection terminal of the connector is inserted into the insertion hole of the main board. A printed circuit board connection method characterized by inserting the printed circuit board until the end surface is in close contact with the board surface and then soldering the connection on the back side. (4) The printed circuit board connection method according to claim (3), wherein the connection is performed in an angular relationship perpendicular to the main board. (5) Claim (3) characterized in that the connector body is supported by the connector body in close contact with the main board and held in an upright state.
) or the printed circuit board connection method described in (4).